package com.zhanghe.study.huaweiod;

public class Test {
    String str = new String("good");
    char[] ch = {'a','b','c'};

    public static void main(String[] args) {
        Test ex=new Test();
        ex.change(ex.str,ex.ch);
        System.out.println(ex.str+"and");
        System.out.println(ex.ch);
    }

    public void change(String str,char[] ch){
        str="test ok";
        ch[0]='g';
    }
}
